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Received November 2, 2010
Accepted November 30, 2010
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천연섬유질을 심재로 사용한 친환경 복합단열재의 물성
Physical Properties of Environment-friendly Insulating Composite Materials Using Natural Cellulose as a Core Material
공주대학교 화학공학부, 331-717 충남 천안시 부대동 서북구 부대동 275 1공주대학교 건축학부, 331-717 충남 천안시 부대동 서북구 부대동 275
Department of Chemical Engineering, Kongju National University, 275 Budae-dong, Cheonan-si, Chungnam 331-717, Korea 1Department of Architecture, Kongju National University, 275 Budae-dong, Cheonan-si, Chungnam 331-717, Korea
ehhwang@kongju.ac.kr
Korean Chemical Engineering Research, February 2011, 49(1), 120-127(8), NONE Epub 9 February 2011
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Abstract
친환경 복합단열재를 개발하기 위하여 천연섬유질(목재칩 및 톱밥)을 심재로, 활성황토를 결합재로 사용하였다. 물/결합재비 및 천연섬유질/결합재비를 다양하게 변화시켜 공시체를 제작하였으며, 공시체의 제 물성을 조사하기 위하여 압축 및 휨강도, 흡수성, 내열수성, 열전도도, 세공분포측정 및 SEM에 의한 미세조직 관찰을 실시하였다. 그 결과 흡수율은 천연섬유질/결합재비가 증가될수록 증가되었으나 폴리머/결합재비 증가에 따라 현저히 감소되었다. 압축 및 휨 강도는 물/결합재비 및 천연섬유질/결합재비에 따라 다양한 특성을 나타내었다. 천연섬유질/결합재비 및 폴리머/결합재비가 증가됨에 따라 열전도도는 감소되었다. SEM조사에서 활성황토 결합재는 수화결정체가 잘 형성되어 치밀한 조직을 관찰할 수 있었고, 활성황토를 결합재로 사용한 시편의 총세공량은 생황토를 결합재로 사용한 시편의 총세공량에 비하여 적게 나타났다.
For the development of the environment-friendly insulating composite materials, natural cellulose (wood chip and sawdust) was used as a core material and activated Hwangtoh was used as a binder. Various specimens were prepared with the water/binder ratio and natural cellulose/binder ratio. The physical properties of these specimens were then investigated through compressive and flexural strength test, absorption test, hot water resistance test, thermal conductivity,_x000D_
measurement of pore distribution and observation of micro-structures using scanning electron microscope (SEM). Results showed that the absorption ratio increased with the increase of natural cellulose/binder ratio but decreased remarkably with the increase of polymer/binder ratio. The compressive and flexural strength development varied appreciably with the increase of water/binder ratio and natural cellulose/binder ratio. On the other hand, thermal conductivity decreased with the increase of natural cellulose/binder ratio and polymer/binder ratio. Through SEM, it was found that activated Hwangtoh that reacted with water formed a hydrate crystal leading to the compact structure and the total pore volume of the specimen using activated Hwangtoh was smaller than that of the non-activated Hwangtoh.
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